Fine Metal Mask Welding Pattern for Flatness
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Solution Overview
Problem
Wrinkles on the surface of Fine Metal Mask (FMM) sheets during the manufacturing process affect the flatness of evaporation effective areas, leading to poor quality of the evaporated product.
Innovation Solution
A mask sheet with a consistent distribution of welding areas around evaporation effective areas, both at the edge and inner regions, to ensure uniform force application and reduce wrinkles, improving the flatness and quality of the evaporated product.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If welding areas are only distributed around evaporation effective areas in inner regions, then manufacturing process is simpler, but wrinkles occur on the mask surface affecting flatness
Solution Approach 1:
The mask sheet is divided into multiple mask units, each containing evaporation effective areas and welding areas. The welding areas are segmented and distributed at specific positions (including four corners and intermediate positions) around each evaporation effective area, allowing localized control of surface flatness while maintaining overall structural integrity
Solution Approach 2:
Welding areas are strategically positioned at different locations around each evaporation effective area based on local requirements. The distribution includes corner positions and intermediate positions, with each position serving specific functions in preventing wrinkles and maintaining flatness in different regions of the mask surface
2Manufacturing precision
If welding areas are distributed uniformly around all evaporation effective areas, then mask surface flatness is improved, but manufacturing complexity increases
Solution Approach 1:
The welding areas serve multiple functions: they provide structural support, control surface flatness, prevent wrinkles during stretching, and serve as attachment points. This multi-functionality allows a standardized distribution pattern to be applied across all mask units, simplifying manufacturing while achieving the desired flatness
Data Source
AI summary
The present disclosure relates to a mask sheet. The mask sheet includes a plurality of mask units. Each mask unit includes an evaporation effective area and a plurality of welding areas that are distributed around the evaporation effective area according to a preset rule. The distribution of the welding areas around the evaporation effective areas of the mask units at the edge of the mask sheet is consistent with the distribution of the welding areas around the evaporation effective areas of the mask units located in the inner region of the mask sheet.